A) 10 rpm
B) 20 rpm
C) 120 rmp
D) 180 rpm
Correct Answer: B
Solution :
\[\frac{Speed\,\,of\,\,lead\,\,screw}{Speed\,\,of\,\,spindle}=\frac{Pitch\,\,of\,\,threads}{pitch\,\,of\,\,lead\,\,screw}\] Speed of lead screw \[=\left( \frac{2\times 60}{6} \right)=20\,rmp\]You need to login to perform this action.
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